Some modern Unity games add a secondary, hidden checksum. You change health=10 to health=999 , but the game also stores a hidden value like health_checksum=0x5A3F . Solution: Search the save file for keys containing "hash", "check", "crc", or "signature". You must update these simultaneously.
Editing ES3 files is for personal use but carries risks: save editor es3
is a standalone desktop application (often found as ES3SaveEditor.exe ) designed to read, parse, and modify these specific files without needing the original game’s source code. Some modern Unity games add a secondary, hidden checksum
The most convenient method is using a browser-based tool that supports the .es3 format. save editor es3